The Secret Life of Machines is an educational television series presented by Tim Hunkin and Rex Garrod, in which the two explain the inner workings and history of common household and office machinery. According to Hunkin, the show's creator, the programme was developed from his comic strip The Rudiments of Wisdom, which he researched and drew for the Observer newspaper over a period of 14 years. Three separate groupings of the broadcast were produced and originally shown between 1988 and 1993 on Channel 4 in the United Kingdom, with the production subsequently airing on The Learning Channel and the Discovery Channel.
Each of the Secret Life's individual series covers a particular set of machines. The first addresses household appliances, while the second includes devices used outside the home, such as the car. The third series examines the contraptions and gadgets used in a modern office.
The series was released on video tape and DVD. It subsequently became available on online streaming sites on the Internet.
Tim Hunkin himself encourages others to download the series from peer-to-peer file sharing networks.